Apparatus for making dies and patrices.



E. T. MOPHBRSON.

APPARATUS FOR MAKING DIES AND PATRIGES.

' APPLICATION FILED JAN. 28, 1905.

1 IIiiI'iliili Witnesses I r zhlg f jfi mw m n b lama? r UNITED-STATES PATENT OFFICE.

ELMERT. MQPHERSON, or WILMINGTON, o-Hi'o.

APPARATUS FOR MAKING DIES AND PATRICES.'

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed January 28, 1905. Serial Ila-243,123.

To alZ whom it may concern:

drill dies, dies for forging balls for ball-bearmatter of the present invention.

ings, or the like. I

. The object of the invention is to secure accurate adjustment andpositive holding of the matrix or patrix stock relatively to the hammer, whereby the production of matrices and patrices having sharp and well-defined outlines may be secured, furthermore, to facilitate the positioning of the matrix or patrix stock upon the anvil to expedite and simplify the operation of stamping.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of an apparatus for makingmatrices and pat- .rices, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this Specification, and in which like characters of reference indicate correspond- .ing parts, Figure 1 1s aviewin side elevation of a drop-hammer, exhibiting the apparatus of the present invention combined therewith. Fig. 2 is a perspective detail view, partly in section, of the apparatus forming the subject- Fig. 3 is a perspective detail view of one form of patrix. Fig. 4C is a similar viewof a matrix formed by the patrix shown in Fig. 3.

' Referring to the drawings, 1 designates drop-hammer of any preferred construction, which, as usual, works between vertical guides 2. While the invention is herein shown as used in connection with a drop-hammer, it is to be understood that it is not to be limited to this adaptation alone, as any other form of hammer may be employed or even a press for accomplishing the objects in view, and as this will be readily understood detailed illustration of such application is deemed unnecessary. The hammer is provided with the usual dovetail-shaped recess 3, in which is secured the patrix 4, as by a key or wedge 5. The

patrix herein shown exhibits one adapted for constructing a matr1x for heading Irwin auger-bits and is merely exhibitive of one application of the invention.

The hammer-bed 6 is provided with a dovetailed groove or recess 7 to receive a similarlyshaped rib 8, carried by the matrix or patrix holder, (designated generally 9,) a wedge or key 10 serving to hold the rib rigidly and posi-' tively combined with the bed.

The matrix or patrix blank holder, which be understood that the invention is not to be limited to this particular shape, as the parts maybe of any other contour and still be within the scope of the invention.

As above stated, one of the objects of the invention is to effect accurate adjustment of the -matrixholder relative to the patrix,

whereby the formation of absolutely true matrices shall be secured, or by reversing the parts that is to say, by combining the matrix 7 with the hamm'erto secure the production 5 constitutes the gist of the present invention,

of accurate patrices. This resultis secured by having the anvil laterally and longitudinally adjustable relatively to the anvil-block and by the provision of means whereby the anvil shall be positively held; in its adjusted posi-.

tion. To accomplish this object, the anvilblock and anvil are each provided in this instance with slotted boltways 14 and 15, re f spectively, there being four of the boltways: provided in each of the parts in this instance and disposed at right angles to each other-;

that is to say, the'boltways in the anvil-block will be disposed longitudinally thereof and those in the anvil transversely thereof, or vice versa. The boltways are engaged by bolts 16, having heads seated in recesses 17 in the under face of the anvil-block and carrying at their upper ends nuts 18 and 18*, by which the anvilmay be rigidly clamped to the anvilblock, as will beapparent.

.The socket-piece is provided centrally of its length and width with a seat 19, that is of a shape to conform exactly to the blank stock, .which, as usual, is approximately wedgeshaped in cross-section. It is essential that the matrix or patriX stock or blank should closely fit within the seat, in order that in the operation of forming a die or patrix there will be no lateral yielding or bulging, which would detract from the accuracy of the design to be imparted. With this end in view the socket-piece is made very heavy, and when closed or in operative position, as shown in Fig. 1, it is firmly clamped upon the anvil through the medium of a pair of shackles 20, hinged to the edge of the socket-piece and provided with orifices 21 to straddle lugs 22, carried by the anvil and preferably integral therewith, the shackles being provided with jam-screws 23, which, as will be obvious, by coaction with the lugs 22 will firmly clamp the die-socket upon the anvil.

In order to allow the socket-piece to rest flat upon the anvil, the under side of the former is provided with two closed-sided recesses 2 1, into which will project the nuts 18 of the rear pair of bolts, or those next to the hinges, while the front portion of the'soeket-piece is provided with two open-sided recesses 25, into which willproject the nuts 18 on the forward pair of bolts, or those next to the shackles. The object of providing the open-sided recesses 25 is to permit of a wrench being brought into engagement with the nuts disposed therein for the purpose of initially clamping the anvil upon the anvil-block, thus to hold it in adjustment while the other pair of nuts is tightened.

In the use of the blank-holder after the same has been positioned upon the hammer-bed a blank 26, which, as will be understood, will be devoid of any design, is placed upon the anvil and all the nuts loosened, and the socketpiece is then secured in position. Of course it will be understood that previous to this the patrix will have been combined with thehammer. The socket-piece will be of greater thickness than the height of the blank, so that when the socket-piece is secured in position, as shown in Fig. 1, there will be a space 27 between its upper face and the blank, and this space is provided to permit the patrix to enter the seat, thus to insure its proper contact with the blank. The parts having been adjusted as described, the hammer is lowered and if the patrix readily enters the seat the pair of nuts 18 is tightened. The hammer is then lifted, the socketpiece thrown back, and the other pair of nuts 18 is tightened. Should the patrix be unable to enter the seat. then the anvil will be moved laterally or longitudinally, as the case may be, until it is properly positioned relative to the patriX, and the nuts will then be tightened in the manner described. As soon as all of the parts have been properly adjusted the hammer is raised and allowed to fall, forming thereby either a matrix or patrix, as the case may be.

In order to facilitate the entry of the pa trix or matrix, as the case may be, within the seat, its upper edges will be marginally reduced, as at 28, and where a patrix is to be formed the blank will be cut away on each side of the design, as shown by dotted lines at 29 in Fig. 1, thus to facilitate the formation of the patrix and reducing the power necessary for the purpose, it being seen that by removing the stock there will be less metal to be compressed by the matrix to form the design on the patrix. Of course after the formation of the patrix there will be a lin or bur surrounding the edges of the blank; but this will be cut or ground away in the usual manner.

Although the apparatus herein described is simple of construction, it will be found of the highest eificiency and durability in use and may be readily applied to an ordinary hammer or press without requiring any change in its structural arrangement.

By the improved manner of efiecting adjustment of the anvil and socket-piece relative to the hammer it will be seen that absolute accurate coaction between the patrix and blank may at all times be secured, and, further, that when the adjustment is once secured it will remain undisturbed, so that the formation of the patrices or dies may be rapidly and accurately effected.

Having thus described the invention, what is claimed is 1. In an apparatus of the class described, an anvil-block, a longitudinally and transversely adjustable anvil combined therewith, and a socket-piece having a pivotal connection with the anvil.

2. In an apparatus of the class described, the combination with an anvil-block, and a longitudinally and transversely adjustable anvil, of a socket-piece pivotally connected with the anvil, and means carried by the anvil and thesoeket-piece for locking the two parts together.

3. In an apparatus of the class described, the combination with an anvil-block, of an anvil longitudinally and transversely adjustable thereon, means coacting with the anvilblock for locking the anvil in its adjusted position, a socket-piece having a hinge connection with the anvil, lugs projecting from the anvil, shackles carried by the socket-piece and adapted to engage the lugs, and means carried by the shackles to hold them in locked engagement with the lugs.

1. In an apparatus of the class described, the combination with an anvil-block and an anvil, one of which is provided with a plurality of longitudinally-extended boltways and the other with a like number of transversely-extended boltways, of bolts engaging the ways and having their upper ends pro- 'jecting above the anvil, nuts carried by the my own I have hereto afliixed my signature in 7 bolts, and a socket-piece hinged to the anvil the presence of two Witnesses. and having recesses to receive the nuts, certain of the recesses being open-sided toper- ELMER MCPHERSON' 5 mit access to the nuts disposed therein for the Witnesses:

purpose of adjustment. JOE T. DOAN,

In testimony that I claim the foregoing as H, G. CARTWRIGHT. 

